Have you thought about using a hight field for the maze walls?  Then you
could reduce the amount of objects and probably speed up the rendering.
This is the technique Gilles Tran uses for his building faces.  You'd just
have to output an a bitmap instead, or do it with the new functions, which I
haven't tried yet.

--
#macro Q(A,E,W)box{-A/2,A/2pigment{rgb 9*W}translate E*A+W/1000}#end#macro
M(D,E)#local A=1/pow(3,D);#if(D<3)#local C=D+1;union{M(C,1)M(C,x+y)M(C,x+z)
M(C,y+z)M(C,x+y-z)M(C,x+z-y)M(C,y+z-x)M(C,x-y)M(C,z-x)M(C,y-z)M(C,y-x)M(C,
x-z)M(C,z-y)M(C,x-y-z)M(C,y-x-z)M(C,z-x-y)translate A*E}#else Q(A,E,x)Q(A,E
,y)Q(A,E,z)#end#end union{M(0,0)rotate<45,145,0>translate z*2}//Andrew

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